Mixtures and Dissolving

Hi Guys

Mixtures: Mixtures are when two things are added together.

Dissolving: When an item combines with a liquid.

What factors effects rates of dissolving and why: Heat, stirring and surface area all speed up the time it takes for items to dissolving.

Solubles: Things that can dissolve in water.

Insoluble: Things that cant dissolve in water.

Aim: To find out the time it takes for sugar to dissolve in different situations.

Equipment: 2x Beakers, sugar, a small metal spatula, and water.

Method: This experiment has four parts to it so you can test the speed that it takes to dissolve and see the dissolving rate.

1. Pour 50mLs of cold water into a beaker and a spatula of sugar start a timer and stir. 

2. Pour 50mLs of hot water into a beaker and a spatula of sugar start a timer and stir. 

3. Pour 50mLs of cold water into a beaker and a spatula of sugar start a timer.

4. Pour 50mLs of hot into a beaker and a spatula of sugar start a timer.

Results: These times are the average and total times for all the groups in our class.

1. Total: 274 sec Average: 54 sec

2. Total: 119 sec Average: 29.75 sec

3. Total: 381 sec Average: 76.2 sec

4. Total: 819 sec Average: 163.8 sec

Discussion:

Our results made sense because the one that was the fastest combined two things that speed up the time of dissolving. This is because when you add heat and stir it add speed to the matter and it starts to dissolve.

The results also show that the one with nothing that affects the time it take to dissolve will end up as the slowest.

We started with sugar and water and at the end we end up with sugarwater.

BYE!